Erlangen 2022 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 40: Optomechanics and Photonics

Q 40.6: Poster

Wednesday, March 16, 2022, 16:30–18:30, P

Towards net energy gain in photonic chip-based particle accelerators — •Stefanie Kraus, Roy Shiloh, Johannes Illmer, Tomas Chlouba, Peyman Yousefi, Norbert Schönenberger, and Peter Hommelhoff — Physics Department, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstraße 1, 91058 Erlangen

Particle accelerators are not only widely used in research and industry, but also in clinical practice. Nevertheless, the enormous costs and dimensions of the meter-long accelerators limit their application even for tabletop accelerators in laboratories. Taking advantage of photonic nanostructures and ultrashort laser pulses, a new scheme for high-gradient particle accelerators has been developed. Until now, the transverse forces acting on the electrons have limited the beam transport through longer structures due to significant particle loss and dephasing. The alternating phase focusing (APF) scheme here eliminates this loss by alternating focusing and defocusing the electrons in the transverse and longitudinal directions, thus confining them in a narrow channel. We have experimentally demonstrated this low-loss electron transport over a 77.7 micrometer long silicon-based nanostructure in agreement with particle tracking simulations [1,2]. In this contribution we discuss the current state of the experiment towards building the particle accelerator on a chip.